# Bug on vtkPolyData with vtkPolygons visualization?

**URL:** <https://discourse.vtk.org/t/bug-on-vtkpolydata-with-vtkpolygons-visualization/14241>\
**Category:** Development\
**Tags:** python\
**Created:** [July 15, 2024, 3:56pm UTC](https://discourse.vtk.org/t/bug-on-vtkpolydata-with-vtkpolygons-visualization/14241 "2024-07-15T15:56:35Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![dgobbi](https://discourse.vtk.org/user_avatar/discourse.vtk.org/dgobbi/32/18_2.png) [@dgobbi](https://discourse.vtk.org/u/dgobbi)\
**Post date:** [July 15, 2024, 4:53pm UTC](https://discourse.vtk.org/t/bug-on-vtkpolydata-with-vtkpolygons-visualization/14241/2 "2024-07-15T16:53:39Z")

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Polygons must be convex for rendering. Further info:

[https://discourse.vtk.org/t/concave-polygon-issue-with-solid-representation-and-vtkdelaunay2d](https://discourse.vtk.org/t/concave-polygon-issue-with-solid-representation-and-vtkdelaunay2d)

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_[View the full topic](https://discourse.vtk.org/t/bug-on-vtkpolydata-with-vtkpolygons-visualization/14241)._